Placement rule does not behave as expected

apiVersion: v1
kind: ConfigMap
metadata: 
  name: yunikorn-configs
  namespace: yunikorn
data: 
  log.level: "DEBUG"
  admissionController.filtering.defaultQueue: ""
  queues.yaml: |
    partitions: 
      - name: default
        placementrules: 
          - name: provided
            create: false
          - name: tag
            value: namespace
            create: true
        queues: 
        - name: root
          submitacl: "*"
          queues: 
            - name: sandbox
              submitacl: "*"

apiVersion: v1
kind: Pod
metadata: 
  labels: 
    app: sleep
    applicationId: "application-sleep-0001"
  name: task0
spec: 
  schedulerName: yunikorn
  restartPolicy: Never
  containers: 
    - name: sleep-30s
      image: "alpine:latest"
      command: ["sleep", "30"]
      resources: 
        requests: 
          cpu: "100m"
          memory: "500M"